Yang Jiang

Zhen Zihao and his younger sister Zhen Xiaoyun were born in Longmen and depended on each other growing up. After Xiaoyun got into a conflict with others, she was sentenced to fifteen years in prison. Zihao, who was released early for good behavior, later learned that his sister had taken her own life. He visited the relevant government departments to understand the circumstances of her death, then quietly buried her ashes alongside their parents. From that moment on, he vowed to uncover and bring down Zhou Qing, the person who had lured Xiaoyun into committing the crime.

Louis Koo plays 009, or translated literally from its aural pronunciation, double-O Dog. He's one of 12 special Royal Bodyguards of a simpleton Emperor (Liu Yiwei) who named these 12 guards after the Chinese Zodiac, hence 9 translated to Dog. Unlike his peers, Dog is a scientist, and relies pretty much on his brains and fantastical gadgets to protect his Majesty from evil ninja assassins.